Prime time: Fatigue and set effects in the perception of reversible figures

Long, Gerald M.; Toppino, Thomas C.; Mondin, Gregory W.

doi:10.3758/bf03211697

Cited by 98 publications

(133 citation statements)

References 31 publications

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“…In addition, it is known that briefly presenting an unambiguous version of a bistable figure prior to presenting the corresponding ambiguous figure can produce priming effects. In this regard, our results are consistent with the findings of Long et al (1992), who showed the effects of short, prior presentations of an unambiguous version of an ambiguous figure (previous experience or perceptual learning) on the response of observers.…”

Section: How Prior Experience Affected the Responsessupporting

confidence: 92%

How Does the Mind Handle Uncertainty in Ambiguous Figures?

Moreno-Sánchez¹,

Aznar-Casanova²,

Torro-Alves³

2016

JPR

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How does the mind select one interpretation from a bistable stimulus and how this eventually becomes conscious?We briefly presented 17 rotations of an ambiguous figure to observers and asked them to give a quick response. We were interested in determining how observer factors, stimulus properties and context influence the selected response.Data analysis revealed that observers assigned probabilistically each figure rotation to a category according to an implicit criterion of typicality or prototype. From discriminant analyses we ascertain how the standardized coefficients change as do the testing conditions, mainly when stimulus information is lacking or confusing. Results suggest that the proximity to the prototype expresses the uncertainty of the subject's response and may be gradually manipulated by the orientation of the figure. Depending on the uncertainty value, discriminant strength of the observer and contextual factors have greater influence on responses than the physical properties of the ambiguous stimulus.

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Section: How Prior Experience Affected the Responsessupporting

confidence: 92%

How Does the Mind Handle Uncertainty in Ambiguous Figures?

Moreno-Sánchez¹,

Aznar-Casanova²,

Torro-Alves³

2016

JPR

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“…Such a gamma-band mechanism is congruent with a bottom-up approach to the increase was not found. Since binding-related gamma explanation of reversible figures [21,29,35,43,72], since activity was found in a number of studies, the failure of the slowly decreasing alpha activity probably reflects a this activity in the present study may be due to the small passive and automatic process which is not represented in…”

Section: Oscillatory Activitymentioning

confidence: 61%

MEG alpha activity decrease reflects destabilization of multistable percepts

Strüber

Herrmann

2002

Cognitive Brain Research

100

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Multistable stimuli offer the possibility to investigate visual awareness, since they evoke spontaneous alternations between different perceptual interpretations of the same stimulus and, therefore, allow to dissociate perceptual from stimulus-driven mechanisms. In the present study, we used an ambiguous motion paradigm and compared endogenous reversals of perceived motion direction which occur spontaneously during constant ambiguous stimulation with exogenous reversals that were induced externally by changes of stimulation. Contrasting the two conditions allowed to investigate processes that trigger endogenous reversals, since the related activity should be absent in the exogenous reversal condition. We employed ambiguous dot patterns which can easily be transformed to present two stable motion directions in order to induce exogenous pattern reversals. Whole-head MEG was recorded from 10 subjects. We analyzed event-related fields (ERFs) and oscillatory activity in the alpha and gamma ranges. The results showed P300-like slow waves in response to both endogenous and exogenous reversals reflecting the conscious recognition of pattern reversals. Analyses in the gamma-band did not reveal any significant modulations. The alpha activity showed different time courses for endogenous and exogenous reversals. While the exogenous alpha activity decreased in temporal relation to the pattern reversal, the endogenous alpha activity displayed a continuous decrease starting in the time interval preceding the reversal. This time course of the endogenous alpha activity is consistent with a bottom-up approach to figure reversals, since it reflects a process of destabilization of the actual percept until a switch of visual awareness occurs. 

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“…In particular, Long, Toppino, and Mondin (1992) had participants view unambiguous Necker cube figures for prime durations ranging from 1 to 150 s (ambiguity was removed by rotation and occlusion in separate conditions). For short prime durations, participants initially interpreted a subsequently presented ambiguous Necker cube in accord with the prime presentation, and for long prime durations the opposite was true.…”

Section: Perceptual Primingmentioning

confidence: 99%

Persistence and accommodation in short-term priming and other perceptual paradigms: temporal segregation through synaptic depression

Huber

2003

Cognitive Science

140

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Perceptual input changes constantly in an unpredictable fashion, often changing before our somewhat sluggish perceptual systems have adequately processed this input. This can give rise to source confusion-how do we know whether a given perceptual activation is due to the current input, or a previous input that had yet to be completely processed? We propose that activity-dependent neural accommodation naturally limits this source confusion by suppressing items once they have been identified. We review behavioral paradigms from different literatures that measure the correlates of persistence and accommodation. Of the various accommodative mechanisms, we focus on synaptic depression, deriving a rate-coded expression that can be used to produce accommodating dynamics in any neural network with real valued activation. We implement this expression in a hierarchical model of perception termed, "a neural mechanism for responding optimally with unknown sources of evidence" (nROUSE). This model can be viewed as a more detailed version of the more abstract ROUSE model of Huber, Shiffrin, Lyle, and Ruys (2001), which produces accommodated levels of feature evidence through an optimal calculation. We apply nROUSE to three short-term priming experiments that manipulated prime duration.

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Prime time: Fatigue and set effects in the perception of reversible figures

Cited by 98 publications

References 31 publications

How Does the Mind Handle Uncertainty in Ambiguous Figures?

How Does the Mind Handle Uncertainty in Ambiguous Figures?

MEG alpha activity decrease reflects destabilization of multistable percepts

Persistence and accommodation in short-term priming and other perceptual paradigms: temporal segregation through synaptic depression

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